Não informado. (1962). Annals of the Geological Survey. Republic of South Africa, Department of Mines.
Chicago-Zitierstil (17. Ausg.)Não informado. Annals of the Geological Survey. Pretoria, Africa do Sul: Republic of South Africa, Department of Mines, 1962.
MLA-Zitierstil (8. Ausg.)Não informado. Annals of the Geological Survey. Republic of South Africa, Department of Mines, 1962.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.